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Alekssandra [29.7K]
4 years ago
9

Need help ASAP!!!! Will give brainliest!!

Chemistry
1 answer:
erik [133]4 years ago
4 0

for one you could do a bell, ringing noise, then say someone rang it.

For two you could do tunnel, echoing, then say someone yelled and it echoed.

for three you could do a bowl, ringing, spoon hitting it

hope i could help

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Look at the model below. Which formula is best represented by this model?​
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The third answer because there are two of each atom
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18 grams<br> 4 kilograms<br> 8 kilograms
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A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (nonreacting) impurity. Identify a quantity
grandymaker [24]

Answer:

Mass of Ca in sample, Mass of Br in sample, Number of moles of Ca in sample, Number of moles of Br in sample, Mass or moles of element other than Ca or Br in sample

Explanation:

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Good luck,

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3 years ago
How many moles of solute are contained in 3.0 L of a 1.5 M solution? Helppp pleaseee
Art [367]
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3 years ago
If 3.89 × 1024 atoms of a noble gas is collected and it has a mass of of 848 grams, this element is most likely a. He b. Ne c. A
bearhunter [10]

Answer:

Xenon

Explanation:

Avogadro’s number represent the number of the constituent particles which are present in one mole of the substance. It is named after scientist Amedeo Avogadro and is denoted by N_0.

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N_a=6.023\times 10^{23}

Let the molar mass of the element is x g/mol

So,

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Also,

3.89\times 10^{24} atoms have a mass of \frac{x}{6.023\times 10^{23}}\times 3.89\times 10^{24} g

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So,

\frac{x}{6.023\times 10^{23}}\times 3.89\times 10^{24}=848

x= 131.3 g/mol

This mass correspond to xenon.

3 0
4 years ago
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